Medieval Hospital Food

Today the Guardian asks whether medieval hospital food was superior to that provided today.  What jumps out is this bit:

• "It’s important to remember that for most patients in the past there was much less division between “medicine” and “food” than is the case now. The dominant humoral understanding of the body explained disease as an imbalance of the major fluids of the body, of hot, cold, wet and dry “qualities”. These imbalances could be cured by altering diet, environment, exercise patterns and sleeping habits, as well as with medicines and bloodletting – so a personalised diet might be part of a course of medical therapy."

Their understanding seems in part to be right, but for the wrong reasons!